crank replacement, Jackson

A handy person from Minneapolis says:
Good afternoon - the crank assembly in one of my house windows has gone bad. It no longer cranks the window inward. This is a left-side opening window, with part number R30842 stamped on one of the arms. The housing has worn away and cracked, which I assume is part of the problem. The crank arm will not stay in place, and wants to pop out.

Your assistance is appreciated. -Tom
User submitted photos of a window operator.
Profile picture of Tom
Tom from SWISCO responded:
Thanks for posting. For the operators, see our 39-031 and 39-032. You may also want a new cover, so see our 39-107. Let me know if this hardware matches your own.
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